| (19) |
 |
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(11) |
EP 0 493 032 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
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13.01.1993 Bulletin 1993/02 |
| (43) |
Date of publication A2: |
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01.07.1992 Bulletin 1992/27 |
| (22) |
Date of filing: 20.12.1991 |
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| (51) |
International Patent Classification (IPC)5: C07F 15/00 |
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| (84) |
Designated Contracting States: |
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CH DE ES FR GB IT LI |
| (30) |
Priority: |
20.12.1990 JP 413188/90
20.06.1991 JP 175981/91
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| (71) |
Applicant: SUMITOMO PHARMACEUTICALS COMPANY, LIMITED |
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Osaka-shi
Osaka-fu (JP) |
|
| (72) |
Inventors: |
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- Sunagawa, Makoto
Itami-shi,
Hyogo 664 (JP)
- Matsumura, Haruki
Nara-shi,
Nara 630 (JP)
- Kitamura, Yutaka
Nishinomiya-shi,
Hyogo 662 (JP)
|
| (74) |
Representative: Cresswell, Thomas Anthony et al |
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J.A. Kemp & Co.
14 South Square
Gray's Inn
London WC1R 5LX
London WC1R 5LX (GB) |
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| |
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| (54) |
Crystalline palladium tetrakis(triphenyl-phosphine) and a process for preparing the
same |
(57) Crystalline palladium tetrakis(triphenylphosphine) which exhibits a specific powder
X-ray pattern and is excellent in storage stability is obtained by allowing palladium
chloride to react with triphenylphosphine in aprotic polar solvents, treating the
reaction mixture with an aqueous hydrazine solution, collecting the resulting crystals
by filtration, washing with alcohols and further washing with hydrocarbon solvents.